"But, I might also enjoy a bit of belt sanding and a bit of power hosing too"
Mark, for what it's worth, my favorite new tool is a $20 air-powered angled grinder from Harbor Freight. THAT baby can really do a number on a stubborn gum print!
Ya know, I tried using a belt sander on some gum prints and the sandpaper got clogged. Ought we begin a discussion thread on how best to gently persuade gum to behave when using sandpaper?